Pressure-regulator



(No Model.)

A KRASTIN PRESSURE REGULATOR.`

No. 588,118.r Patented Aug. 10,1897.

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UNITED STATES PATENT CEEICE.

AUGUST KRASTIN, OF CLEVELAND, OHIO.

PRESSURE-REGULATOR.

SPECIFICATION forming part of LettezsPatent No. 588,113, dated August10, 1897.

Application filed April 21, 1896.

To @ZZ whom it may concern.-

Beit known that I, AUGUST KRASTIN, a subject of the Czar of Russia,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented certain new and useful Improvements in Compound-Lever Pressure-Regulating Apparatus; and I do hereby declare the following to be afull, clear, and eX- act description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

My invention relates to an improved pressure-regulatin g apparatus whichis more particularly adapted to serve in the capacity of a feed orautomatic expansion valve in connection with refrigerating or ice-makingmachinery between the so-called high and low pressure sides thereof.

The objects of my improvement are, rst, to render the apparatusextremely sensitive in operation, and, second, to adord facilities for aproper adjustment of the feed-controlling parts thereof. I attain theseobjects by the mechanism illustrated in the accompanying drawings, inwhich- Figure l represents a transverse sectional view of saidapparatus, and Fig. 2 is an eX- l terior side view of the same.

Like letters of reference denote like parts in the drawings andspecification.

In pressure-regulating contrivances it is the peculiar application ofcompound levers which constitutes the essential feature of my invention.The said levers are interposed between the valve part of the apparatusor contrivance and the means of or for controling the extent of lift ofsaid valve from oft' its seat, and all of which parts being arranged ina neat, compact, and adjustable manner in and with a frame formed orconstructed substantially as shown in Figs. l and 2. Said frame A properconsists of the sides a a, the flanges Z) Z9', and the bearings c CZ. Ate and f support is had for the levers B C, and attachedA to said angesis the valve-casing D and bonnet E, each of which having interposed ametallic flexible disk or plate g and c'. (See Fig. l.) The plate gisemployed in preference of a stuffing-box for the stem Zt of the valve,while the plate z' serves as a pressure-yielding cover over said bonnet,which is thereby rendered useful as a means for ap- Serial No. 588,490.(No model.)

l iin(r a counterressure avainst the valve- D l e s stem h in the manneras hereinafter described.

As shown, the valve-casing D has its inlet at Za and outlet at Z, andthe branches thereof are adapted for pipe connection, as shown in Figs.l and 2. The seat for the needle-point of the stem ZL 4is formed bymeans of the angularly-perforated plug m, which is inserted through theplugged opening n. This seat for the stem might be formed in the valveproper, but a plug of hardened steel is preferable for obvious reasons.

At 0 the stem h is securely fastened to the plate g, from where saidstem extends through the guide or bearing c to make contact with thelever B. Likewise is fastened a pin p to the plate t', which extendsthrough the guide CZ and bears against the free end of the lever C.

The levers B and C are held apart by means of the set-screw F, and thelatter can be adjusted within the slotted free end of the lever B toeffect a compound action of said levers in a degree and manner asrequired under variable conditions.

The bonnet E is equipped at q for connection with the pipe systemleading from or being in open relation with the valve-outlet Z. Thus thevery pressure which is prevailing in said pipe system becomes active asan agent for controlling the feed from k to Z, which parts respectivelyrepresent the high and low pressure sides of or in a refrigeratingapparatus. In the high-pressure side a highly-volatile liquid iscontained, and it is through the valve that said liquid is expanded intogaseous state of a predetermined pressure, which in passing through thelow-pressure pipe system produces the refrigerating effect. A rise abovethe norm al pressure thus causes a bulging out of the plate t' indirection toward the valve-stem, which thereupon approaches its seatuntil by either an entire closing of the valve or a diminished feedthrough said valve the normal pressure becomes restablished.

The peculiar arrangement of the levers in relation to the stem h and thepin p, together with the movable set-screw F, permits of adjusting theapparatus with regard to the flexibility of the plates g and t' as wellas tothe pressure which is to be maintained in the lowpressure pipesystem.

Although the above-described apparatus has been pointed out as beingparticularly suited for use as an expansionvalve in refrigeratingapparatuses, it is evident, however, that the same may generally be usedin the capacity of an automatic pressure reducing or regulating valve.

What I claim, and desire to secure by Letters Patent, is

1. In a pressure-regulating apparatus the combination With the valve Dand needle-stein h of the iexible disk g, bonnet E with yielding coveri, frame A supporting said valve and bonnet, one opposite the other, andlevers B, C, placed between the sides of said frame in contact withneedle-stem 7i and yielding cover z' and the free end of lever B havingadjustable connection upon lever C near the pivot thereof, allconstructed and arranged as and lfor the purpose set forth.

2. In a pressure-regulating apparatus the combination of the frame Acomprising the sides a a, flanges Z) b 'and bearings c d, the bonnet Ewith pressure-yielding cover i secured to one of said flanges, the ValveD with needle-stem 7L and iiexible disk g attached to the other ange,the lever B pivoted at e in contact with the stem h and provided'with alongitudinally-adjustable set-screw F, and

the lever C pivoted at f bearing against screw 3o F and resting uponsaid cover all constructed substantially as and for the purposedescribed.

In testimony whereof I affix my signature in presence of two Witnesses.

AUGUST KRASTIN.

lVitnesses:

B. F. EIBLER, S. Q. KERRUISH.

